The Design For High-Pprecision And Real-Time Coordinate Acquisition System Based On ARM9Processor And Embeded Linux

As a satellite navigation system, GPS is widely used now. Especiallyin the survey, power, petroleum, geology, mining, forestry, agricultureand other industries in China and abroad for the current widespread use ofGPS positioning and coordinate acquisition. But because of the satelliteorbit errors, clock errors, and the delay of ionospheric and tropospheric,the accuracy of positioning and the coordinate is low, just only10to100meters, can not meet the accuracy requirements. Coordinates record in thecollector, until after the end of field work, export the recorded coordinatefor processing, can not meet some areas of real-time coordinateacquisition and monitor requirements. And there is some real-timecoordinate collector is mainly based on the Windows Mobile operatingsystem.This paper select Samsung’s S3C2440which is ARM9based asCPU, and port embedded Linux operating system, to build the workplatform. On the platform by extending the high-precision positioningmodule OEMStar^TM, wireless data transmission module Q24PLUS, it is ready to complete the hardware of system. In software, written by theassociated drive control of the hardware module, and thus complete theprotocol based on RTCM. Final we get the DGPS precision coordinateswhich calculated by module, transformation coordinates, and send themto the server by GPRS. So we complete the high-precision coordinatereal-time acquisition, to meet the specific coordinate acquisition forreal-time and monitor.